enable altivec detection via sysctl(machdep.altivec)
pixman 0.28.2
call ioctl(WSDISPLAYIO_SMODE, ...) in EnterTV/LeaveVT so kernel graphics
drivers get notified when we switch in and out of X
when using /dev/wskbd* we need to close the device when VT switching out of
X, and open it again when switching back